Adam Gault/Thinkstock(BOYNTON BEACH, Fla.) -- When a Florida woman rolled up to a drive-thru ATM on Sunday, she was confronted with an ethical dilemma -- in the form of 18 $100 bills sticking out of the cash slot.

The previous customer apparently forgot to take his or her cash, and so Adriana Allen tried in vain to stuff the money back into the machine. When that failed, she did what not many people would have done: Allen called the cops.

The honest Chase customer held onto the stack of bills until cops arrived to take possession of it. They contacted the bank in an effort to track down the bills' rightful owner.

There's no word if Allen will be rewarded for her act of honesty -- though the Boynton Beach Police Department thanked her on its Facebook page saying, "We thank Adriana for her honesty and compassion, and for doing the right thing."